Lpc2000

Because my MCU has not enough SPI pins so I can only use I/O pins as 
control SPI.But I'm not sure that the way of the IO pins simulate 
SPI.Should I send a pluse(0),follow it send a datum then send another 
pluse(1).At I/O port,I can only send a datum at the same time and can 
not send a byte or two byte data?

On Monday 25 July 2005 13:42, fangneu wrote:
> Because my MCU has not enough SPI pins so I can only use I/O pins as
> control SPI.But I'm not sure that the way of the IO pins simulate
> SPI.Should I send a pluse(0),follow it send a datum then send another
> pluse(1).At I/O port,I can only send a datum at the same time and can
> not send a byte or two byte data?

I will let you into a little secret of mine. I have been using SPI for over 
ten years and have never used an SPI peripheral. I have always bit-banged the 
SPI mastering. I will be changing that for a project I just started though, 
because I need faster speed.

The easiest way to do this is to  the data sheet for the device you are 
talking to and look at the timing diagrams.